Pulsed Laser Deposition of Rocksalt Magnetic Binary Oxides

Here we systematically explore the use of pulsed laser deposition technique (PLD) to grow three basic oxides that have rocksalt structure but different chemical stability in the ambient atmosphere: NiO (stable), MnO (metastable) and EuO (unstable). By tuning laser fluence, an epitaxial single-phase nickel oxide thin-film growth can be achieved in a wide range of temperatures from 10 to 750 {\deg}C. At the lowest growth temperature, the out-of-plane strain raises to 1.5%, which is five times bigger than that in a NiO film grown at 750 {\deg}C. MnO thin films that had long-range ordered were successfully deposited on the MgO substrates after appropriate tuning of deposition parameters. The growth of MnO phase was strongly influenced by substrate temperature and laser fluence. EuO films with satisfactory quality were deposited by PLD after oxygen availability had been minimized. Synthesis of EuO thin films at rather low growth temperature prevented thermally-driven lattice relaxation and allowed growth of strained films. Overall, PLD was a quick and reliable method to grow binary oxides with rocksalt structure in high quality that can satisfy requirements for applications and for basic research

The Estimation of Food Sources for Macroinvertebrates as Stenopsyche marmorata in Natory Stream by Fatty Acid

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Numerical study on desalinated water flux from NACL solution using hollow fiber type DCMD module

Paper presented at the 9th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Malta, 16-18 July, 2012.The direct contact membrane distillation process is used for water desalination. DCMD is a thermally driven separation process, in which only vapor molecules transfer through a microporous hydrophobic membrane. The driving force in the DCMD process is the vapor pressure difference induced by the temperature difference across the hydrophobic membrane. In this study, the one-dimensional based model is developed for predicting the performance of the seawater desalination to produce fresh water for hollow fiber type DCMD module. The mass, energy and momentum balance equations are coupled to determine the concentration of NaCl, the temperature and velocity distribution of the feed and permeate side along the module length, and productivity of fresh water in the DCMD process. The KMPT model is used to calculate the mass transfer at the membrane surface. The mathematical and kinetics models used in this study are validated in comparison of the present simulation results with previous data given in the literature. The simulation results are in good agreement with the data in the literature. The performance of pure water production rate with respect to the membrane distillation coefficient is compared with the previously reported data. The numerical analysis is performed on a DCMD module using hollow fiber type PVDF membrane with a pore size of 0.22 μm. Feed solutions are aqueous NaCl solution. The values of the parameters considered in this work are: feed temperature, 40-70 ; feed velocity, 0.472m/s to 0.55m/℃ s; mass fraction of salt, 0.025-0.05; cold permeate temperature, 17-45℃ and the velocity of the permeate side are 0.3 m/s. It is found that the production rate of fresh water increases with feed temperature and velocity, but decreases with feed concentration.dc201

Numerical study on CO2 absorption efficiency by using aqueous monoethanolamine solution in CO2 absorber column

Paper presented at the 8th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Mauritius, 11-13 July, 2011.In this study, the one-dimensional rate based model is developed for predicting the performance of the CO2 absorber column using aqueous monoethanolamine (MEA) solution. To determine the concentration of each species and temperature distribution along the column height, mass and heat balance equations of vapor and liquid phase are coupled with chemical reactions in MEA-CO2-H2O system. The two-film model is applied to estimate the mass transfer in the vapour and liquid film. To calculate the enhancement factor, three types of reaction rate coefficient of the CO2/aqueous MEA reaction are considered. The mathematical and reaction kinetics models used in this study are validated in the comparison of simulation results with experimental data given in the literature. The simulation results are in good agreement with the data in the literature. In addition, three types of reaction rate coefficient suggested by Hikita et al., Versteeg et al. and Aboudheir et al. are considered. The performance of CO2 absorber column with respect to the reaction rate coefficients is compared with experimental data.mp201

A Case of Acute Myocardial Infarction with the Anomalous Origin of the Right Coronary Artery from the Ascending Aorta above the Left Sinus of Valsalva and Left Coronary Artery from the Posterior Sinus of Valsalva

Coronary anomalies are rare angiographic findings. Moreover, there are few reports of cases of an anomalous origin of the right coronary artery from the left sinus of Valsalva and of the left coronary artery from the posterior sinus of Valsalva. Here, we report a case with an anomalous origin of the right coronary artery from the ascending aorta above the left sinus of Valsalva and the left coronary artery from the posterior sinus of Valsalva. This was observed in a patient who was treated for a myocardial infarction of the inferior wall caused by a thrombus in the proximal right coronary artery. The patient was treated successfully with the implantation of a stent in the anomalous origin of the right coronary artery using a 6Fr Amplatz left 1 catheter